Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 38

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A capacitor of capacitance $C$ is charged with the help of a $200 V$ battery. It is then discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $2.5 \times 10^{2} \frac{J}{kg}$ and mass $0.1 kg .$ If the temperature of the block rises by $0.4 K$ , the value of $C$ is

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Important Questions on Electrostatic Potential and Capacitance

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 39

Which of the following is not true?

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 40

How many

1 μF

capacitors must be connected in parallel to store a charge of

1 C

with a potential of

110 V

across the capacitors ?

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 41

A hollow metal sphere of radius

10 cm

is charged such that the potential on its surface becomes

80 V

. The potential at the centre of the sphere is

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 42

Charge

q_{2}

is at the centre of a circular path with radius

r .

Work done in carrying charge

q_{1}

once around this equipotential path, would be

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 43

An electric dipole of dipole moment

p

is placed in the position of stable equilibrium in uniform electric field of intensity

E .

This is rotated through an angle

θ

from the initial position. The potential energy of the electric dipole in the final position is

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 24

There is an electric field

E

in

x -

direction. If the work done on moving a charge of

0.2 C

through a distance of

2 m

along a line making an angle

60 °

with

x -

axis is

4 J

then what is the value of

E

?

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 45

Two metallic spheres of radii

1 cm

and

2 cm

are given charges

10^{- 2} C

and

5 \times 10^{- 2} C

, respectively. If they are connected by a connecting wire, the final charge on the smaller sphere is

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 46

The energy stored in a capacitor of capacity

C

and potential

V

is given by